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CVE-2026-86064

8.6 · HIGH

Klever-Go is the Go implementation of the Klever blockchain protocol.

Published Sep 23, 2026CWE-200EPSS 0.58%

Overview

CVE-2026-86064 is a high-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, the default-open GET /log WebSocket route configured in config/node/api.yaml and registered by network/api/api.go does not require authentication. The first client message is parsed as a logger Profile in network/api/logs/logSender.go and applied process-wide through Profile.Apply, allowing a remote client to change global log levels and formatting options until the connection closes. The same connection is registered as a log observer and can receive live process logs. An attacker can suppress normal logs, increase verbosity, distort operator visibility, and access operational information without credentials. This issue is fixed in version 1.7.20.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/klever-io/klever-go/commit/a2740c985a788fb69e17742ea4f0c37c440733b2GitHubgithub.com/klever-io/klever-go/pull/74GitHubgithub.com/klever-io/klever-go/releases/tag/v1.7.20GitHubgithub.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcmGitHubgithub.com/klever-io/klever-go/security/advisories/GHSA-9v8p-frvj-2pcm

How CyberStrike helps

Frequently asked questions

What is CVE-2026-86064?

CVE-2026-86064 is a high-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-86064?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-86064?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-86064?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-86064 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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